Alert archive / New Jersey / Flash Flood Watches in 2009
Flash Flood Watch 10, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Aug 21, 2009, 2:47 PM EDT for 4 states. It was in force for 35 hr.
The area
The counties it named.
The facts
- Issued
- Aug 21, 2009, 2:47 PM EDT (18:47 UTC)
- Expired
- Aug 23, 2009, 2:10 AM EDT
- In force
- 35 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
All 31 counties
Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Carbon County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 67 km from the middle of the area, began a volume at 18:49 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.8 hours before the alert went out and 94 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 96 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 930 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS61 KPHI 211847 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 247 PM EDT FRI AUG 21 2009 DEZ001-MDZ008-NJZ001-007>010-012-015>019-PAZ054-055-060>062- 067>071-220900- /O.NEW.KPHI.FF.A.0010.090821T1847Z-090822T1600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET- MIDDLESEX-MERCER-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON- CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS- DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...NEWTON... WASHINGTON...MORRISTOWN...FLEMINGTON...SOMERVILLE... NEW BRUNSWICK...TRENTON...PENNSVILLE...GLASSBORO...CAMDEN... CHERRY HILL...MOORESTOWN...MOUNT HOLLY...JIM THORPE... STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 247 PM EDT FRI AUG 21 2009 ...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY MORNING... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE... NORTHEAST MARYLAND...NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NORTHEAST MARYLAND...CECIL. IN NEW JERSEY...CAMDEN... GLOUCESTER...HUNTERDON...MERCER...MIDDLESEX...MORRIS... NORTHWESTERN BURLINGTON...SALEM...SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS...BUCKS...CARBON...CHESTER... DELAWARE...LEHIGH...MONROE...MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * THROUGH SATURDAY MORNING * A SERIES OF SHOWERS AND THUNDERSTORMS ACCOMPANIED BY HEAVY RAIN WILL AFFECT THE REGION THROUGH TONIGHT AND SATURDAY MORNING. EVENT PRECIPITATION TOTALS SHOULD AVERAGE 1 TO 3 INCHES WITH LOCAL AMOUNTS TO AROUND 5 INCHES. EACH SERIES OF THUNDERSTORMS WILL MAKE THE REGION MORE VULNERABLE TO FLOODING AS IT SOAKS THE GROUND AND RAISES STREAM LEVELS. WHILE THE AIR MASS OVER THE REGION IS QUITE HUMID AND TROPICAL IT IS NOT DIRECTLY ASSOCIATED WITH HURRICANE BILL. WHAT HURRICANE BILL WILL DO IS SLOW THE PROGRESSION OF A COLD FRONT TO OUR WEST AND CAUSE SHOWERS AND THUNDERSTORMS TO MOVE OVER THE SAME AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. DO NOT TRAVEL ON ROADWAYS THAT ARE PRONE TO POOR DRAINAGE FLOODING. DO NOT DRIVE AROUND BARRICADES. && $$ HEAVENER/MIKETTA/GIGI
3 follow-up statements
000 WGUS61 KPHI 220704 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 304 AM EDT SAT AUG 22 2009 DEZ001-MDZ008-NJZ001-007>010-012-015>019-PAZ054-055-060>062- 067>071-222030- /O.EXT.KPHI.FF.A.0010.000000T0000Z-090823T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET- MIDDLESEX-MERCER-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON- CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS- DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...NEWTON... WASHINGTON...MORRISTOWN...FLEMINGTON...SOMERVILLE... NEW BRUNSWICK...TRENTON...PENNSVILLE...GLASSBORO...CAMDEN... CHERRY HILL...MOORESTOWN...MOUNT HOLLY...JIM THORPE... STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 304 AM EDT SAT AUG 22 2009 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH LATE TONIGHT... THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR * PORTIONS OF NORTHERN DELAWARE...NORTHEAST MARYLAND...NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NORTHEAST MARYLAND...CECIL. IN NEW JERSEY...CAMDEN...GLOUCESTER...HUNTERDON...MERCER... MIDDLESEX...MORRIS...NORTHWESTERN BURLINGTON...SALEM... SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS... BUCKS...CARBON...CHESTER...DELAWARE...LEHIGH...MONROE... MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * THROUGH LATE TONIGHT * SHOWERS AND THUNDERSTORMS WILL BE ACCOMPANIED BY TORRENTIAL DOWNPOURS THROUGH EARLY TONIGHT BEFORE SLOWLY TAPERING OFF FROM THE WEST LATE TONIGHT. DURING THE DAY TODAY AND THROUGH TONIGHT, HEAVY RAIN WILL FALL WITH 1 TO 3 INCHES EXPECTED. SOME AREAS WILL PROBABLY SEE AMOUNTS AS HIGH AS 5 INCHES. THE RAIN TODAY IS IN ADDITION TO WHAT ALREADY FELL FRIDAY NIGHT. WHILE THE AIR MASS OVER THE REGION IS QUITE HUMID AND TROPICAL IT IS NOT DIRECTLY ASSOCIATED WITH HURRICANE BILL. WHAT HURRICANE BILL WILL DO IS SLOW THE PROGRESSION OF A COLD FRONT TO OUR WEST AND CAUSE SHOWERS AND THUNDERSTORMS TO STAY OVER THE AREA. HOWEVER, THE LOCATION OF THE HEAVIEST RAINFALL WILL VARY THROUGH THE DAY. EVEN SO, SHOWERS AND THUNDERSTORMS WITH TORRENTIAL RAIN MAY CONTINUE TO MOVE OVER THE SAME AREAS FOR SEVERAL HOURS LEADING TO FLASH FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. DO NOT TRAVEL ON ROADWAYS THAT ARE PRONE TO POOR DRAINAGE FLOODING. DO NOT DRIVE AROUND BARRICADES. && $$ RNS/
000 WGUS61 KPHI 221726 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 126 PM EDT SAT AUG 22 2009 DEZ002>004-MDZ012-015-019-020-NJZ013-014-020>027-231000- /O.EXA.KPHI.FF.A.0010.000000T0000Z-090823T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ KENT-INLAND SUSSEX-DELAWARE BEACHES-KENT MD-QUEEN ANNES-TALBOT- CAROLINE-WESTERN MONMOUTH-EASTERN MONMOUTH-OCEAN-CUMBERLAND- ATLANTIC-CAPE MAY-ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC- COASTAL OCEAN-SOUTHEASTERN BURLINGTON- INCLUDING THE CITIES OF...DOVER...GEORGETOWN...REHOBOTH BEACH... CHESTERTOWN...CENTREVILLE...EASTON...DENTON...FREEHOLD... SANDY HOOK...JACKSON...MILLVILLE...HAMMONTON... CAPE MAY COURT HOUSE...OCEAN CITY...ATLANTIC CITY... LONG BEACH ISLAND...WHARTON STATE FOREST 126 PM EDT SAT AUG 22 2009 ...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS EXPANDED THE * FLASH FLOOD WATCH TO INCLUDE PORTIONS OF DELAWARE...NORTHEAST MARYLAND AND NEW JERSEY...INCLUDING THE FOLLOWING AREAS...IN DELAWARE...DELAWARE BEACHES...INLAND SUSSEX AND KENT. IN NORTHEAST MARYLAND...CAROLINE...KENT MD...QUEEN ANNES AND TALBOT. IN NEW JERSEY...ATLANTIC...ATLANTIC COASTAL CAPE MAY... CAPE MAY...COASTAL ATLANTIC...COASTAL OCEAN...CUMBERLAND... EASTERN MONMOUTH...OCEAN...SOUTHEASTERN BURLINGTON AND WESTERN MONMOUTH. * THROUGH LATE TONIGHT * SHOWERS AND THUNDERSTORMS WILL BE ACCOMPANIED BY TORRENTIAL DOWNPOURS THROUGH TONIGHT BEFORE SLOWLY TAPERING OFF LATE. ANOTHER ORGANIZED AREA OF SHOWERS AND THUNDERSTORMS IS EXPECTED TO MOVE INTO OUR AREA FROM VIRGINIA LATER TODAY. IN ADDITION, SCATTERED SHOWERS AND THUNDERSTORMS COULD DEVELOP PRECEDING IT. HEAVY RAIN SHOULD FALL WITH AN AVERAGE OF 1 TO 2 INCHES EXPECTED, BUT THERE COULD BE LOCALIZED AMOUNTS AS HIGH AS AROUND 5 INCHES. WHILE THE AIR MASS OVER THE REGION IS QUITE HUMID AND TROPICAL IT IS NOT DIRECTLY ASSOCIATED WITH HURRICANE BILL. WHAT HURRICANE BILL HAS DONE IS SLOW THE PROGRESSION OF A COLD FRONT TO OUR WEST AND CAUSE SHOWERS AND THUNDERSTORMS TO STAY OVER THE AREA. THE LOCATION OF THE HEAVIEST RAINFALL WILL CONTINUE TO VARY. EVEN SO...SHOWERS AND THUNDERSTORMS WITH TORRENTIAL RAIN MAY CONTINUE TO MOVE OVER THE SAME AREAS FOR SEVERAL HOURS LEADING TO FLASH FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. DO NOT TRAVEL ON ROADWAYS THAT ARE PRONE TO POOR DRAINAGE FLOODING. DO NOT DRIVE AROUND BARRICADES. && $$ DEZ001-MDZ008-NJZ001-007>010-012-015>019-PAZ054-055-060>062- 067>071-231000- /O.CON.KPHI.FF.A.0010.000000T0000Z-090823T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET- MIDDLESEX-MERCER-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON- CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS- DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...NEWTON... WASHINGTON...MORRISTOWN...FLEMINGTON...SOMERVILLE... NEW BRUNSWICK...TRENTON...PENNSVILLE...GLASSBORO...CAMDEN... CHERRY HILL...MOORESTOWN...MOUNT HOLLY...JIM THORPE... STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 126 PM EDT SAT AUG 22 2009 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NORTHERN DELAWARE...NORTHEAST MARYLAND...NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NORTHEAST MARYLAND...CECIL. IN NEW JERSEY...CAMDEN...GLOUCESTER...HUNTERDON...MERCER... MIDDLESEX...MORRIS...NORTHWESTERN BURLINGTON...SALEM... SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS... BUCKS...CARBON...CHESTER...DELAWARE...LEHIGH...MONROE... MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * THROUGH LATE TONIGHT * SHOWERS AND THUNDERSTORMS WILL BE ACCOMPANIED BY TORRENTIAL DOWNPOURS THROUGH TONIGHT BEFORE SLOWLY TAPERING OFF LATE. ANOTHER ORGANIZED AREA OF SHOWERS AND THUNDERSTORMS IS EXPECTED TO MOVE INTO OUR AREA FROM VIRGINIA LATER TODAY. IN ADDITION, SCATTERED SHOWERS AND THUNDERSTORMS COULD DEVELOP PRECEDING IT. HEAVY RAIN SHOULD FALL WITH AN AVERAGE OF 1 TO 2 INCHES EXPECTED, BUT THERE COULD BE LOCALIZED AMOUNTS AS HIGH AS AROUND 5 INCHES. WHILE THE AIR MASS OVER THE REGION IS QUITE HUMID AND TROPICAL IT IS NOT DIRECTLY ASSOCIATED WITH HURRICANE BILL. WHAT HURRICANE BILL HAS DONE IS SLOW THE PROGRESSION OF A COLD FRONT TO OUR WEST AND CAUSE SHOWERS AND THUNDERSTORMS TO STAY OVER THE AREA. THE LOCATION OF THE HEAVIEST RAINFALL WILL CONTINUE TO VARY. EVEN SO...SHOWERS AND THUNDERSTORMS WITH TORRENTIAL RAIN MAY CONTINUE TO MOVE OVER THE SAME AREAS FOR SEVERAL HOURS LEADING TO FLASH FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. DO NOT TRAVEL ON ROADWAYS THAT ARE PRONE TO POOR DRAINAGE FLOODING. DO NOT DRIVE AROUND BARRICADES. && $$ ROBERTSON/GIGI
000 WGUS61 KPHI 230610 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 210 AM EDT SUN AUG 23 2009 DEZ001>004-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ054- 055-060>062-067>071-230715- /O.CAN.KPHI.FF.A.0010.000000T0000Z-090823T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-KENT-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD- QUEEN ANNES-TALBOT-CAROLINE-SUSSEX-WARREN-MORRIS-HUNTERDON- SOMERSET-MIDDLESEX-WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-SALEM- GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND- ATLANTIC-CAPE MAY-ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC- COASTAL OCEAN-SOUTHEASTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH- NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...DOVER...GEORGETOWN... REHOBOTH BEACH...ELKTON...CHESTERTOWN...CENTREVILLE...EASTON... DENTON...NEWTON...WASHINGTON...MORRISTOWN...FLEMINGTON... SOMERVILLE...NEW BRUNSWICK...FREEHOLD...SANDY HOOK...TRENTON... PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN... MOUNT HOLLY...JACKSON...MILLVILLE...HAMMONTON... CAPE MAY COURT HOUSE...OCEAN CITY...ATLANTIC CITY... LONG BEACH ISLAND...WHARTON STATE FOREST...JIM THORPE... STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...WEST CHESTER... NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 210 AM EDT SUN AUG 23 2009 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF DELAWARE...NORTHEAST MARYLAND...NEW JERSEY AND PENNSYLVANIA HAS BEEN CANCELLED. HEAVY RAIN HAS MOVED OUT OF THE AREA. HOWEVER, SCATTERED SHOWERS AND THUNDERSTORMS ARE STILL POSSIBLE TODAY. IF THEY BECOME MORE WIDESPREAD THEN FORECAST AND LINGER OVER THE SAME AREAS, THEN THE THREAT OF FLOODING WOULD RETURN. $$ RNS
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 3:28 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 62 min |
| Aug 21, 3:48 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 57 min |
| Aug 21, 4:13 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 77 min |
| Aug 21, 12:20 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 55 min |
| Aug 21, 12:55 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 35 min |
| Aug 21, 1:16 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 59 min |
| Aug 21, 1:29 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 76 min |
| Aug 21, 1:52 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 68 min |
| Aug 21, 1:55 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 65 min |
| Aug 21, 2:41 PM EDT | Areal Flood Advisory | PHI | Monroe, Northampton | 3 hr |
| Aug 21, 6:11 AM EDT | Coastal Flood Statement | PHI | Atlantic, Cape May, Monmouth, Ocean | 9 hr |
| Aug 21, 2:34 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 63 min |
| Aug 21, 3:12 PM EDT | High Surf Advisory | PHI | Atlantic, Cape May, Monmouth, Ocean | 53 hr |
| Aug 21, 4:16 PM EDT | Special Marine Warning | PHI | 59 min |
Nearby
Flash Flood Watches in New Jersey, 2009Flash Flood Watches in Pennsylvania, 2009Flash Flood Watches in Maryland, 2009Every flash flood watch in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.