Alert archive / Arizona / Flash Flood Warnings in 1994
Flash Flood Warning 8, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Aug 11, 1994, 6:48 PM MST for Maricopa County, Arizona. It was in force for 87 min.
The area
The counties it named.
The facts
- Issued
- Aug 11, 1994, 6:48 PM MST (01:48 UTC)
- Expired
- Aug 11, 1994, 8:15 PM MST
- In force
- 87 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Maricopa County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 1.8 hours before the alert went out and 198 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
- 527 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 2955 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Aug 11, 5:19 PM MST, 1 hour 29 minutes before
AZZ001-004-007-008-1117+-- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 520 PM MST THU AUG 11 1994 ...STRONG THUNDERSTORMS OVER WEST CENTRAL ARIZONA... AT 515 PM MST, NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED AN AREA OF STRONG THUNDERSTORMS OVER WEST CENTRAL ARIZONA. THE STRONGEST STORMS EXTENDED FROM NEAR WENDEN, IN NORTHEAST LA PAZ COUNTY, NORTH-NORTHEAST TO NEAR BAGDAD IN EXTRME WESTERN YAVAPAI COUNTY. THE STORMS WERE MOVING VERY SLOWLY TO THE WEST AT LESS THAN 5 MPH. RADAR ESTIMATED RAINFALLS OF BETWEEN ONE-HALF AND ONE INCH HAVE OCCURRED ACROSS PORTIONS OF EXTREME YAVAPAI COUNTY, AND RAINFALLS OF BETWEEN 1 AND 2 INCHES MAY ACCUMULATE IN THIS AREA BETWEEN 5:15 AND 6 PM. MOTORISTS TRAVELING ALONG HIGHWAY 60 EAST OF WENDEN AND HIGHWAY 93 IN FAR WEST YAVAPAI COUNTY SHOULD WATCH FOR PONDING OF WATER ON ROADS OR WATER FLOWING IN NORMALLY DRY WASHES. PIERCE
Special weather statement, Aug 11, 5:20 PM MST, 1 hour 28 minutes before
AZZ001-004-007-008-1117+-- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 520 PM MST THU AUG 11 1994 ...STRONG THUNDERSTORMS OVER WEST CENTRAL ARIZONA... AT 515 PM MST, NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED AN AREA OF STRONG THUNDERSTORMS OVER WEST CENTRAL ARIZONA. THE STRONGEST STORMS EXTENDED FROM NEAR WENDEN, IN NORTHEAST LA PAZ COUNTY, NORTH-NORTHEAST TO NEAR BAGDAD IN EXTRME WESTERN YAVAPAI COUNTY. THE STORMS WERE MOVING VERY SLOWLY TO THE WEST AT LESS THAN 5 MPH. RADAR ESTIMATED RAINFALLS OF BETWEEN ONE-HALF AND ONE INCH HAVE OCCURRED ACROSS PORTIONS OF EXTREME YAVAPAI COUNTY, AND RAINFALLS OF BETWEEN 1 AND 2 INCHES MAY ACCUMULATE IN THIS AREA BETWEEN 5:15 AND 6 PM. MOTORISTS TRAVELING ALONG HIGHWAY 60 EAST OF WENDEN AND HIGHWAY 93 IN FAR WEST YAVAPAI COUNTY SHOULD WATCH FOR PONDING OF WATER ON ROADS OR WATER FLOWING IN NORMALLY DRY WASHES. PIERCE
Special weather statement, Aug 11, 5:34 PM MST, 1 hour 14 minutes before
AZZ004-005-008-120030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 535 PM MST THU AUG 11 1994 ...WEAK THUNDERSTORMS MOVING INTO NORTHERN MARICOPA COUNTY... AT 530 PM MST, NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED AN AREA OF MOSTLY WEAK THUNDERSTORMS OVER SOUTHEAST YAVAPAI AND SOUTHWEST GILA COUNTIES. THESE STORMS ARE MOVING SLOWLY TO THE SOUTH AND WILL REACH NORTHERN MARICOPA COUNTY BEFORE 6 PM MST. PERSONS IN NORTHERN MARICOPA COUNTY WILL EXPERIENCE WEAK NORTHERLY WINDS OF 10 TO 20 MILES PER HOUR IN ADVANCE OF THESE THUNDERSTORMS. SOME LOCALIZED BLOWING DUST MAY AFFECT VISIBILITIES FOR MOTORISTS. DOPPLER RADAR INDICATES THESE STORMS ARE PRODUCING LIGHT, IF ANY, RAINFALL. PIERCE
Special weather statement, Aug 11, 5:35 PM MST, 1 hour 13 minutes before
AZZ004-005-008-120030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 535 PM MST THU AUG 11 1994 ...WEAK THUNDERSTORMS MOVING INTO NORTHERN MARICOPA COUNTY... AT 530 PM MST, NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED AN AREA OF MOSTLY WEAK THUNDERSTORMS OVER SOUTHEAST YAVAPAI AND SOUTHWEST GILA COUNTIES. THESE STORMS ARE MOVING SLOWLY TO THE SOUTH AND WILL REACH NORTHERN MARICOPA COUNTY BEFORE 6 PM MST. PERSONS IN NORTHERN MARICOPA COUNTY WILL EXPERIENCE WEAK NORTHERLY WINDS OF 10 TO 20 MILES PER HOUR IN ADVANCE OF THESE THUNDERSTORMS. SOME LOCALIZED BLOWING DUST MAY AFFECT VISIBILITIES FOR MOTORISTS. DOPPLER RADAR INDICATES THESE STORMS ARE PRODUCING LIGHT, IF ANY, RAINFALL. PIERCE
Special weather statement, Aug 11, 6:23 PM MST, 25 minutes before
AZZ008-120200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 624 PM MST THU AUG 11 1994 ...RAPIDLY-DEVELOPING THUNDERSTORMS OVER MARICOPA COUNTY... AT 6:20 PM, PHOENIX DOPPLER RADAR DETECTED SEVERAL RAPIDLY-DEVELOPING THUNDERSTORMS OVER FAR NORTHWEST AND SOUTHERN MARICOPA COUNTY. THE STRONGEST STORMS WERE CENTERED 20 MILES WEST-SOUTHWEST OF WICKENBURG. INDIVIDUAL CELLS WERE MOVING SLOWLY TO THE NORTH, AND WILL PRODUCE LOCALLY HEAVY RAIN AND GUSTY WINDS BETWEEN 6:20 AND 6:45 PM. RADAR- ESTIMATED RAINFALLS OF 1 INCH HAVE OCCURRED OVER BLACK BUTTE 10 MILES SOUTHEAST OF AGUILA BETWEEN 5:45 AND 6:20 PM MST. PEOPLE TRAVELING ALONG HIGHWAY 60 BETWEEN AGUILA AND WICKENBURG SHOULD BE ON THE LOOKOUT FOR RAPIDLY-CHANGING WEATHER CONDITIONS, WHICH MAY INCLUDE BLOWING DUST AND PONDING OF WATER ON THE ROAD. A WEAKER THUNDERSTORM WAS LOCATED 20 MILES EAST OF GILA BEND, SHOWED LITTLE MOVEMENT, AND WAS DIMINISHING IN INTENSITY. GREEN
Special weather statement, Aug 11, 6:24 PM MST, 24 minutes before
AZZ008-120200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 624 PM MST THU AUG 11 1994 ...RAPIDLY-DEVELOPING THUNDERSTORMS OVER MARICOPA COUNTY... AT 6:20 PM, PHOENIX DOPPLER RADAR DETECTED SEVERAL RAPIDLY-DEVELOPING THUNDERSTORMS OVER FAR NORTHWEST AND SOUTHERN MARICOPA COUNTY. THE STRONGEST STORMS WERE CENTERED 20 MILES WEST-SOUTHWEST OF WICKENBURG. INDIVIDUAL CELLS WERE MOVING SLOWLY TO THE NORTH, AND WILL PRODUCE LOCALLY HEAVY RAIN AND GUSTY WINDS BETWEEN 6:20 AND 6:45 PM. RADAR- ESTIMATED RAINFALLS OF 1 INCH HAVE OCCURRED OVER BLACK BUTTE 10 MILES SOUTHEAST OF AGUILA BETWEEN 5:45 AND 6:20 PM MST. PEOPLE TRAVELING ALONG HIGHWAY 60 BETWEEN AGUILA AND WICKENBURG SHOULD BE ON THE LOOKOUT FOR RAPIDLY-CHANGING WEATHER CONDITIONS, WHICH MAY INCLUDE BLOWING DUST AND PONDING OF WATER ON THE ROAD. A WEAKER THUNDERSTORM WAS LOCATED 20 MILES EAST OF GILA BEND, SHOWED LITTLE MOVEMENT, AND WAS DIMINISHING IN INTENSITY. GREEN
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 6:48 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 87 min |
| Aug 11, 11:12 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 58 min |
| Aug 11, 11:30 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 55 min |
| Aug 12, 1:10 AM MST | Severe Thunderstorm Warning | PSR | Maricopa | 60 min |
Nearby
Flash Flood Warnings in Arizona, 1994Every flash flood warning in 1994
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.