diff --git a/dags/cumulus/abrfc_qpe_01h.py b/dags/cumulus/abrfc_qpe_01h.py
index 181d035..cded0be 100644
--- a/dags/cumulus/abrfc_qpe_01h.py
+++ b/dags/cumulus/abrfc_qpe_01h.py
@@ -36,9 +36,9 @@
 )
 def cumulus_abrfc_qpe_01h():
     """This pipeline handles download, processing, and derivative product creation for \n
-    Arkansas-Red Basin River Forecast Center (ABRFC) 1HR QPE\n
+    ABRFC QPE\n
     URL Dir - https://tgftp.nws.noaa.gov/data/rfc/abrfc/xmrg_qpe/
-    Files matching abrfc_qpe_01hr_YYYYMMDDHHZ.nc - 1 hour\n
+    Files matching abrfc_qpe_01hr_YYYYMMDDHHZ.nc.gz - 1 hour\n
     Note: Delay observed when watching new product timestamp on file at source.
     Example: timestamp said 15:50, but was pushed to server at 16:07
     """
@@ -49,7 +49,7 @@ def cumulus_abrfc_qpe_01h():
     @task()
     def download_raw_qpe():
         logical_date = get_current_context()["logical_date"]
-        filename = f'abrfc_qpe_01hr_{logical_date.strftime("%Y%m%d%H")}Z.nc'
+        filename = f'abrfc_qpe_01hr_{logical_date.strftime("%Y%m%d%H")}Z.nc.gz'
         s3_key = f"{cumulus.S3_ACQUIRABLE_PREFIX}/{PRODUCT_SLUG}/{filename}"
         print(f"Downloading file: {filename}")
         trigger_download(
diff --git a/dags/cumulus/abrfc_qpf_06h.py b/dags/cumulus/abrfc_qpf_06h.py
index b2590e4..4adee67 100644
--- a/dags/cumulus/abrfc_qpf_06h.py
+++ b/dags/cumulus/abrfc_qpf_06h.py
@@ -56,8 +56,8 @@ def qpf_filenames(edate):
     schedule="8 */6 * * *",
     tags=["cumulus", "precip", "QPF", "ABRFC"],
     doc_md=__doc__,
-    max_active_runs=1,
-    max_active_tasks=2,
+    max_active_runs=2,
+    max_active_tasks=4,
 )
 def cumulus_abrfc_qpf_06h():
     key_prefix = cumulus.S3_ACQUIRABLE_PREFIX
diff --git a/dags/cumulus/aprfc_qpe_06h.py b/dags/cumulus/aprfc_qpe_06h.py
index 07678cc..4fcb486 100644
--- a/dags/cumulus/aprfc_qpe_06h.py
+++ b/dags/cumulus/aprfc_qpe_06h.py
@@ -23,7 +23,7 @@
     "catchup_by_default": False,
     "email_on_failure": False,
     "email_on_retry": False,
-    "retries": 6,
+    "retries": 1,
     "retry_delay": timedelta(minutes=30),
 }
 
@@ -43,8 +43,8 @@ def get_filenames(edate):
     default_args=default_args,
     schedule="40 14,5 * * *",
     tags=["cumulus", "precip", "QPE", "APRFC"],
-    max_active_runs=2,
-    max_active_tasks=4,
+    max_active_runs=1,
+    max_active_tasks=1,
 )
 def cumulus_aprfc_qpe_06h():
     """This pipeline handles download, processing, and derivative product creation for \n
diff --git a/dags/cumulus/aprfc_qpf_06h.py b/dags/cumulus/aprfc_qpf_06h.py
index 99f319c..e87e559 100644
--- a/dags/cumulus/aprfc_qpf_06h.py
+++ b/dags/cumulus/aprfc_qpf_06h.py
@@ -25,7 +25,7 @@
     "catchup_by_default": False,
     "email_on_failure": False,
     "email_on_retry": False,
-    "retries": 6,
+    "retries": 1,
     "retry_delay": timedelta(minutes=30),
 }
 
@@ -128,9 +128,10 @@ def download_raw_qpf():
             url = f"{URL_ROOT}/{filename}"
             s3_key = f"{key_prefix}/{PRODUCT_SLUG}/{filename}"
             # Check if the file already exists in S3
-            if s3_file_exists(cumulus.S3_BUCKET, s3_key):
-                print(f"Skipping existing S3 object: s3://{cumulus.S3_BUCKET}/{s3_key}")
-                continue  # Skip to the next file
+            # needs infrastructure change to reenable this check
+            #if s3_file_exists(cumulus.S3_BUCKET, s3_key):
+            #    print(f"Skipping existing S3 object: s3://{cumulus.S3_BUCKET}/{s3_key}")
+            #    continue  # Skip to the next file
             print(f"Downloading file: {filename}")
             try:
                 trigger_download(url=url, s3_bucket=cumulus.S3_BUCKET, s3_key=s3_key)
diff --git a/dags/cumulus/aprfc_qte_01h.py b/dags/cumulus/aprfc_qte_01h.py
index 37ab964..7dbaddc 100644
--- a/dags/cumulus/aprfc_qte_01h.py
+++ b/dags/cumulus/aprfc_qte_01h.py
@@ -26,7 +26,7 @@
     "catchup_by_default": False,
     "email_on_failure": False,
     "email_on_retry": False,
-    "retries": 6,
+    "retries": 1,
     "retry_delay": timedelta(minutes=30),
 }
 
diff --git a/dags/cumulus/aprfc_qtf_01h.py b/dags/cumulus/aprfc_qtf_01h.py
index 59c87f3..3ec1098 100644
--- a/dags/cumulus/aprfc_qtf_01h.py
+++ b/dags/cumulus/aprfc_qtf_01h.py
@@ -25,7 +25,7 @@
     "catchup_by_default": False,
     "email_on_failure": False,
     "email_on_retry": False,
-    "retries": 6,
+    "retries": 1,
     "retry_delay": timedelta(minutes=30),
 }
 
@@ -131,9 +131,10 @@ def download_raw_qtf():
             url = f"{URL_ROOT}/{filename}"
             s3_key = f"{key_prefix}/{PRODUCT_SLUG}/{filename}"
             # Check if the file already exists in S3
-            if s3_file_exists(cumulus.S3_BUCKET, s3_key):
-                print(f"Skipping existing S3 object: s3://{cumulus.S3_BUCKET}/{s3_key}")
-                continue  # Skip to the next file
+            #need infrastructure changes to reenable this check
+            #if s3_file_exists(cumulus.S3_BUCKET, s3_key):
+            #    print(f"Skipping existing S3 object: s3://{cumulus.S3_BUCKET}/{s3_key}")
+            #    continue  # Skip to the next file
             print(f"Downloading file: {filename}")
             try:
                 trigger_download(url=url, s3_bucket=cumulus.S3_BUCKET, s3_key=s3_key)
diff --git a/dags/cumulus/ncep_stage4_conus_01h.py b/dags/cumulus/ncep_stage4_conus_01h.py
index beb5cff..6a9ec7f 100644
--- a/dags/cumulus/ncep_stage4_conus_01h.py
+++ b/dags/cumulus/ncep_stage4_conus_01h.py
@@ -84,38 +84,7 @@ def notify_cumulus(payload):
                 s3_key=p["s3_key"],
             )
 
-    @task()
-    def download_last_n_products():
-
-        n = 120  # how many products back to download
-        logical_date = get_current_context()["logical_date"]
-        payload = []
-
-        for h in range(1, n + 1):
-            # Skip current hour, we just downloaded it above
-            lookback_date = logical_date - timedelta(hours=h)
-            # logging.info(f"lookback_date: {lookback_date}")
-            dirpath = f'pcpanl.{lookback_date.strftime("%Y%m%d")}'
-            filename = f'st4_conus.{lookback_date.strftime("%Y%m%d%H")}.01h.grb2'
-            filepath = f"{dirpath}/{filename}"
-            try:
-                s3_key = download_product(filepath)
-                payload.append(
-                    {"datetime": lookback_date.isoformat(), "s3_key": s3_key}
-                )
-            except Exception as err:
-                logging.error(f"Failed to download {filepath}.")
-                logging.error(err)
-                # prevent a single failure from stopping the whole task
-                pass
-
-            # sleep to avoid hitting a rate limit on src server
-            time.sleep(2)
-
-        return json.dumps(payload)
-
     notify_cumulus(download_stage4_qpe())
-    notify_cumulus(download_last_n_products())
 
 
 stage4_dag = cumulus_ncep_stage4_conus_01h()
diff --git a/dags/cumulus/ncep_stage4_conus_01h_revision.py b/dags/cumulus/ncep_stage4_conus_01h_revision.py
new file mode 100644
index 0000000..7f6b333
--- /dev/null
+++ b/dags/cumulus/ncep_stage4_conus_01h_revision.py
@@ -0,0 +1,107 @@
+"""
+Acquire and Process NCEP Stage 4 MOSAIC QPE Revisions
+"""
+
+import os, json, logging, time
+from datetime import datetime, timedelta, timezone
+
+# import calendar
+
+from airflow import DAG
+from airflow.decorators import dag, task
+from airflow.operators.python import get_current_context
+
+# from airflow.exceptions import AirflowSkipException
+from helpers.downloads import trigger_download
+
+import helpers.cumulus as cumulus
+
+default_args = {
+    "owner": "airflow",
+    "depends_on_past": False,
+    "start_date": (datetime.now(timezone.utc) - timedelta(hours=1)).replace(
+        minute=0, second=0
+    ),
+    "catchup_by_default": True,
+    "email_on_failure": False,
+    "email_on_retry": False,
+    "retries": 6,
+    "retry_delay": timedelta(minutes=10),
+}
+
+
+@dag(
+    default_args=default_args,
+    schedule="0 18 * * *",
+    tags=["cumulus", "precip", "QPE", "CONUS", "stage4", "NCEP", 'revision'],
+    max_active_runs=1,
+    max_active_tasks=2,
+)
+def cumulus_ncep_stage4_conus_01h_revision():
+    """This pipeline handles download, processing, and derivative product creation for \n
+    NCEP Stage 4 MOSAIC QPE\n
+    URL Dir - https://nomads.ncep.noaa.gov/pub/data/nccf/com/pcpanl/prod/pcpanl.20220808/st4_conus.YYYYMMHHMM.01h.grb2\n
+    Files matching st4_conus.YYYYMMHHMM.01h.grb2 - 1 hour
+    """
+
+    URL_ROOT = f"https://nomads.ncep.noaa.gov/pub/data/nccf/com/pcpanl/prod"
+    PRODUCT_SLUG = "ncep-stage4-mosaic-01h"
+
+    def download_product(filepath):
+
+        filename = os.path.basename(filepath)
+        s3_key = f"{cumulus.S3_ACQUIRABLE_PREFIX}/{PRODUCT_SLUG}/{filename}"
+        # logging.info(f"Downloading file: {filepath}")
+        trigger_download(
+            url=f"{URL_ROOT}/{filepath}", s3_bucket=cumulus.S3_BUCKET, s3_key=s3_key
+        )
+        return s3_key
+
+
+    @task()
+    def notify_cumulus(payload):
+
+        # Airflow will convert the parameter to a string, convert it back
+        payload = json.loads(payload)
+
+        for p in payload:
+            cumulus.notify_acquirablefile(
+                acquirable_id=cumulus.acquirables[PRODUCT_SLUG],
+                datetime=p["datetime"],
+                s3_key=p["s3_key"],
+            )
+
+    @task()
+    def download_stage4_qpe_revision():
+
+        n = 24*14  # how many products back to download
+        logical_date = get_current_context()["logical_date"]
+        payload = []
+
+        for h in range(1, n + 1):
+            # Skip current hour, we just downloaded it in another dag
+            lookback_date = logical_date - timedelta(hours=h)
+            # logging.info(f"lookback_date: {lookback_date}")
+            dirpath = f'pcpanl.{lookback_date.strftime("%Y%m%d")}'
+            filename = f'st4_conus.{lookback_date.strftime("%Y%m%d%H")}.01h.grb2'
+            filepath = f"{dirpath}/{filename}"
+            try:
+                s3_key = download_product(filepath)
+                payload.append(
+                    {"datetime": lookback_date.isoformat(), "s3_key": s3_key}
+                )
+            except Exception as err:
+                logging.error(f"Failed to download {filepath}.")
+                logging.error(err)
+                # prevent a single failure from stopping the whole task
+                pass
+
+            # sleep to avoid hitting a rate limit on src server
+            # time.sleep(2)
+
+        return json.dumps(payload)
+
+    notify_cumulus(download_stage4_qpe_revision())
+
+
+stage4_dag = cumulus_ncep_stage4_conus_01h_revision()
diff --git a/dags/cumulus/prism_backfill_por.py b/dags/cumulus/prism_backfill_por.py
new file mode 100644
index 0000000..3f08952
--- /dev/null
+++ b/dags/cumulus/prism_backfill_por.py
@@ -0,0 +1,89 @@
+import json
+from calendar import monthrange
+from datetime import datetime, timedelta, timezone
+
+import helpers.cumulus as cumulus
+from airflow import DAG
+from airflow.decorators import dag, task
+from airflow.operators.python import get_current_context
+from helpers.downloads import trigger_download
+
+default_args_backfill = {
+    "owner": "airflow",
+    "depends_on_past": False,
+    ### to backfill POR
+    "start_date": datetime(1981, 1, 1),  # Start from 1981
+    "end_date": (datetime.now(timezone.utc) - timedelta(days=180)).replace(
+        minute=0, second=0
+    ),  # Stop 6 months ago
+    "catchup": True,  # Enable backfill
+    ### to force backfill past 6 months
+    "email_on_failure": False,
+    "email_on_retry": False,
+    "retries": 2,
+    "retry_delay": timedelta(minutes=30),
+}
+
+@dag(
+    default_args=default_args_backfill,
+    schedule="30 01 1 * *",  # monthly schedule
+    tags=["cumulus", "backfill", 'prism'],
+    max_active_runs=1,  # Limit concurrent runs
+    max_active_tasks=4,  # Limit concurrent tasks
+)
+def cumulus_prism_backfill_por():
+    """Backfill historical PRISM data month-by-month."""
+
+    URL_ROOT = f"https://data.prism.oregonstate.edu/time_series/us/an/4km"
+
+    @task()
+    def download_historical_prism_month(short_name='ppt'):
+        product_slug = f"prism-{short_name}-early"
+        logical_date = get_current_context()["logical_date"]
+        execution_date = logical_date.date()
+        year = execution_date.year
+        month = execution_date.month
+        results = []
+
+        # Get the number of days in the month
+        num_days = monthrange(year, month)[1]
+
+        for day in range(1, num_days + 1):
+            dt = datetime(year, month, day)
+            file_dir = f'{URL_ROOT}/{short_name}/daily/{dt.strftime("%Y")}'
+            filename = f'prism_{short_name}_us_25m_{dt.strftime("%Y%m%d")}.zip'
+            s3_key = f"{cumulus.S3_ACQUIRABLE_PREFIX}/{product_slug}/{filename}"
+            print(f"Downloading {filename}")
+            try:
+                output = trigger_download(
+                    url=f"{file_dir}/{filename}", s3_bucket=cumulus.S3_BUCKET, s3_key=s3_key,
+                )
+                results.append(
+                    {
+                        "datetime": logical_date.isoformat(),
+                        "s3_key": s3_key,
+                        "product_slug": product_slug,
+                        "filename": filename,
+                    }
+                )
+            except:
+                print(f'Error downloading {filename}')
+        return json.dumps(results)
+
+    @task()
+    def notify_cumulus(payload):
+        payload = json.loads(payload)
+        for item in payload:
+            print("Notifying Cumulus: " + item["filename"])
+            cumulus.notify_acquirablefile(
+                acquirable_id=cumulus.acquirables[item["product_slug"]],
+                datetime=item["datetime"],
+                s3_key=item["s3_key"],
+            )
+
+    notify_cumulus(download_historical_prism_month(short_name='ppt'))
+    notify_cumulus(download_historical_prism_month(short_name='tmax'))
+    notify_cumulus(download_historical_prism_month(short_name='tmin'))
+
+
+backfill_dag = cumulus_prism_backfill_por()
diff --git a/dags/cumulus/prism_early.py b/dags/cumulus/prism_early.py
new file mode 100644
index 0000000..c6dff2f
--- /dev/null
+++ b/dags/cumulus/prism_early.py
@@ -0,0 +1,107 @@
+"""
+Acquire and Process PRISM Real-time
+"""
+
+import json
+from datetime import datetime, timedelta, timezone
+
+from airflow import DAG
+from airflow.decorators import dag, task
+from airflow.operators.python import get_current_context
+from helpers.downloads import trigger_download
+
+import helpers.cumulus as cumulus
+
+default_args = {
+    "owner": "airflow",
+    "depends_on_past": False,
+    "start_date": (datetime.now(timezone.utc)-timedelta(days=14)).replace(
+        minute=0, second=0
+    ),    
+    # "start_date": datetime(2021, 11, 9),
+    "catchup_by_default": True,
+    # "email": ["airflow@airflow.com"],
+    "email_on_failure": False,
+    "email_on_retry": False,
+    "retries": 5,
+    "retry_delay": timedelta(minutes=30),
+    # 'queue': 'bash_queue',
+    # 'pool': 'backfill',
+    # 'priority_weight': 10,
+    # 'end_date': datetime(2016, 1, 1),
+}
+
+
+def generate_filename_for_product(product, date):
+    # product: 'tmin', 'tmax', 'ppt'
+    # date: datetime object
+    return f'prism_{product}_us_25m_{date.strftime("%Y%m%d")}.zip'
+
+@dag(
+    default_args=default_args,
+    schedule="30 12 * * *",
+    tags=["cumulus", 'prism'],
+    max_active_runs=2,
+    max_active_tasks=4,
+)
+
+def cumulus_prism_early():
+    """This pipeline handles download, processing, and derivative product creation for \n
+    PRISM: Min Temp (tmin) early, Max Temp (tmax) early and Precip (ppt) early
+    URL Dir - ftp://prism.nacse.org/daily/tmin/YYYY/
+    Files matching prism_ppt_us_25m_YYYYMMDD.zip'- Daily around 12:30-14:30 UTC
+    """
+
+    URL_ROOT = f"ftp://prism.nacse.org/daily"
+    URL_ROOT = f"https://data.prism.oregonstate.edu/time_series/us/an/4km"
+
+
+    # Download Tasks
+    #################################################
+    @task()
+    def download_raw_prism_early(short_name='ppt'):
+        product_slug = f"prism-{short_name}-early"
+        logical_date = get_current_context()["logical_date"]
+        execution_date = logical_date.date()
+        results = []
+
+        dt = execution_date
+        file_dir = f'{URL_ROOT}/{short_name}/daily/{dt.strftime("%Y")}'
+        filename = generate_filename_for_product(short_name, dt)
+        s3_key = f"{cumulus.S3_ACQUIRABLE_PREFIX}/{product_slug}/{filename}"
+        print(f"Downloading {filename}")
+        try:
+            output = trigger_download(
+                url=f"{file_dir}/{filename}", s3_bucket=cumulus.S3_BUCKET, s3_key=s3_key,
+            )
+            results.append(
+                {
+                    "datetime": logical_date.isoformat(),
+                    "s3_key": s3_key,
+                    "product_slug": product_slug,
+                    "filename": filename,
+                }
+            )
+        except:
+            print(f'Error downloading {filename}')
+        return json.dumps(results)
+
+    # Notify Tasks
+    #################################################
+    @task()
+    def notify_cumulus(payload):
+        payload = json.loads(payload)
+        for item in payload:
+            print("Notifying Cumulus: " + item["filename"])
+            cumulus.notify_acquirablefile(
+                acquirable_id=cumulus.acquirables[item["product_slug"]],
+                datetime=item["datetime"],
+                s3_key=item["s3_key"],
+            )
+
+    notify_cumulus(download_raw_prism_early(short_name='ppt'))
+    notify_cumulus(download_raw_prism_early(short_name='tmax'))
+    notify_cumulus(download_raw_prism_early(short_name= 'tmin'))
+
+
+prism_dag = cumulus_prism_early()
diff --git a/dags/cumulus/prism_revision.py b/dags/cumulus/prism_revision.py
new file mode 100644
index 0000000..b0f5ca0
--- /dev/null
+++ b/dags/cumulus/prism_revision.py
@@ -0,0 +1,110 @@
+"""
+Acquire and Process PRISM Revisions
+"""
+
+import json
+from datetime import datetime, timedelta, timezone
+
+from airflow import DAG
+from airflow.decorators import dag, task
+from airflow.operators.python import get_current_context
+from helpers.downloads import trigger_download
+
+import helpers.cumulus as cumulus
+
+default_args = {
+    "owner": "airflow",
+    "depends_on_past": False,
+    "start_date": (datetime.now(timezone.utc)).replace(
+        minute=0, second=0
+    ),    
+    # "start_date": datetime(2021, 11, 9),
+    "catchup_by_default": True,
+    # "email": ["airflow@airflow.com"],
+    "email_on_failure": False,
+    "email_on_retry": False,
+    "retries": 5,
+    "retry_delay": timedelta(minutes=30),
+    # 'queue': 'bash_queue',
+    # 'pool': 'backfill',
+    # 'priority_weight': 10,
+    # 'end_date': datetime(2016, 1, 1),
+}
+
+
+def generate_filename_for_product(product, date):
+    # product: 'tmin', 'tmax', 'ppt'
+    # date: datetime object
+    return f'prism_{product}_us_25m_{date.strftime("%Y%m%d")}.zip'
+
+@dag(
+    default_args=default_args,
+    schedule="30 12 * * 0", # run once per week sunday
+    tags=["cumulus", 'prism'],
+    max_active_runs=2,
+    max_active_tasks=4,
+)
+
+def cumulus_prism_revision():
+    """This pipeline handles download, processing, and derivative product creation for \n
+    PRISM: Min Temp (tmin) early, Max Temp (tmax) early and Precip (ppt) early
+    URL Dir - ftp://prism.nacse.org/daily/tmin/YYYY/
+    Files matching prism_ppt_us_25m_YYYYMMDD.zip'- Daily around 12:30-14:30 UTC
+    """
+
+    URL_ROOT = f"ftp://prism.nacse.org/daily"
+    URL_ROOT = f"https://data.prism.oregonstate.edu/time_series/us/an/4km"
+
+    DAYS_BACK = 190
+
+    # Download Tasks
+    #################################################
+    @task()
+    def download_raw_prism_revision(short_name='ppt'):
+        product_slug = f"prism-{short_name}-early"
+        logical_date = get_current_context()["logical_date"]
+        execution_date = logical_date.date()
+        start_date = execution_date - timedelta(days=DAYS_BACK)
+        results = []
+
+        for offset in range(DAYS_BACK+1):  # includes today
+            dt = start_date + timedelta(days=offset)
+            file_dir = f'{URL_ROOT}/{short_name}/daily/{dt.strftime("%Y")}'
+            filename = generate_filename_for_product(short_name, dt)
+            s3_key = f"{cumulus.S3_ACQUIRABLE_PREFIX}/{product_slug}/{filename}"
+            print(f"Downloading {filename}")
+            try:
+                output = trigger_download(
+                    url=f"{file_dir}/{filename}", s3_bucket=cumulus.S3_BUCKET, s3_key=s3_key,
+                )
+                results.append(
+                    {
+                        "datetime": logical_date.isoformat(),
+                        "s3_key": s3_key,
+                        "product_slug": product_slug,
+                        "filename": filename,
+                    }
+                )
+            except:
+                print(f'Error downloading {filename}')
+        return json.dumps(results)
+
+    # Notify Tasks
+    #################################################
+    @task()
+    def notify_cumulus(payload):
+        payload = json.loads(payload)
+        for item in payload:
+            print("Notifying Cumulus: " + item["filename"])
+            cumulus.notify_acquirablefile(
+                acquirable_id=cumulus.acquirables[item["product_slug"]],
+                datetime=item["datetime"],
+                s3_key=item["s3_key"],
+            )
+
+    notify_cumulus(download_raw_prism_revision(short_name='ppt'))
+    notify_cumulus(download_raw_prism_revision(short_name='tmax'))
+    notify_cumulus(download_raw_prism_revision(short_name= 'tmin'))
+
+
+prism_dag = cumulus_prism_revision()