Alert archive / Arizona / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 57, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Sep 4, 1994, 6:32 PM MST for Maricopa County, Pinal County, Arizona. It was in force for 63 min.
The area
The counties it named.
The facts
- Issued
- Sep 4, 1994, 6:32 PM MST (01:32 UTC)
- Expired
- Sep 4, 1994, 7:35 PM MST
- In force
- 63 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
Counties Maricopa County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 29 km from the middle of the area, began a volume at 01:35 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
Tuscon, AZ (KTUS), launched 00:00Z, 1.5 hours before the alert went out and 143 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
- 945 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 1768 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- -57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 severe thunderstorm 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, Sep 4, 3:20 PM MST, 3 hours 12 minutes before
AZZ008-050030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 320 PM MST SUN SEP 4 1994 ...STRONG THUNDERSTORMS BUILDING OVER THE DISTANT MOUNTAINS NORTH OF PHOENIX MOVING SOUTH TOWARD THE FAR NORTHERN PORTIONS OF THE GREATER PHOENIX AREA AT 310 PM... AT 310 PM PHOENIX DOPPLER RADAR DETECTED A GROUP OF STRONG THUNDERSTORMS MOVING OFF THE MOUNTAINS AND BUILDING TOWARD THE FAR NORTHERN PORTIONS OF THE GREATER PHOENIX AREA. THESE THUNDERSTORMS ARE BEING MONITORED CLOSELY AND COULD LEAD TO THE DEVELOPMENT OF MORE SIGNIFICANT WEATHER ACROSS PARTS THE GREATER PHOENIX AREA LATER IN THE AFTERNOON. THERE IS A GOOD CHANCE OF THUNDERSTORMS AND RAIN IN THE SALT RIVER VALLEY LATE THIS AFTERNOON AND EVENING. RESIDENTS AND MOTORISTS SHOULD MONITOR WEATHER CONDITIONS IN THE AREA. THUNDERSTORMS WILL MOVE INTO THE PHOENIX AREA FROM THE NORTH. HEAVY RAIN AND STRONG WINDS TO 50 MPH ARE POSSIBLE, ALONG WITH DENSE BLOWING DUST. AT 320 PM THUNDERSTORMS WERE DEVELOPING NEAR THE COMMUNITY OF CAREFREE AND CAVE CREEK. VASQUEZ
Special weather statement, Sep 4, 3:25 PM MST, 3 hours 7 minutes before
AZZ008-050030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PHOENIX AZ 320 PM MST SUN SEP 4 1994 ...STRONG THUNDERSTORMS BUILDING OVER THE DISTANT MOUNTAINS NORTH OF PHOENIX MOVING SOUTH TOWARD THE FAR NORTHERN PORTIONS OF THE GREATER PHOENIX AREA AT 310 PM... AT 310 PM PHOENIX DOPPLER RADAR DETECTED A GROUP OF STRONG THUNDERSTORMS MOVING OFF THE MOUNTAINS AND BUILDING TOWARD THE FAR NORTHERN PORTIONS OF THE GREATER PHOENIX AREA. THESE THUNDERSTORMS ARE BEING MONITORED CLOSELY AND COULD LEAD TO THE DEVELOPMENT OF MORE SIGNIFICANT WEATHER ACROSS PARTS THE GREATER PHOENIX AREA LATER IN THE AFTERNOON. THERE IS A GOOD CHANCE OF THUNDERSTORMS AND RAIN IN THE SALT RIVER VALLEY LATE THIS AFTERNOON AND EVENING. RESIDENTS AND MOTORISTS SHOULD MONITOR WEATHER CONDITIONS IN THE AREA. THUNDERSTORMS WILL MOVE INTO THE PHOENIX AREA FROM THE NORTH. HEAVY RAIN AND STRONG WINDS TO 50 MPH ARE POSSIBLE, ALONG WITH DENSE BLOWING DUST. AT 320 PM THUNDERSTORMS WERE DEVELOPING NEAR THE COMMUNITY OF CAREFREE AND CAVE CREEK. VASQUEZ
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 6:10 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 60 min |
| Sep 4, 6:43 PM MST | Tornado Warning | PSR | Pinal | 32 min |
| Sep 4, 7:25 PM MST | Flash Flood Warning | PSR | Pinal | 80 min |
| Sep 4, 7:25 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 80 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 1994Every severe thunderstorm 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; radar from the NEXRAD Level II archive.