Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 25, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 13, 2001, 3:08 PM MST for Maricopa County, Pinal County, Arizona. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Aug 13, 2001, 3:08 PM MST (22:08 UTC)
- Expired
- Aug 13, 2001, 4:00 PM MST
- In force
- 52 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Maricopa County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 24 km from the middle of the area, began a volume at 22:07 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
Phoenix, AZ (KPSR), launched 12:00Z, 10.1 hours before the alert went out and 26 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
- 569 J/kg
- Mixed-layer CIN
- -171 J/kg
- Mixed-layer LCL
- 1682 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
967 WUUS55 KPSR 132209 SVRPHX AZC013-021-132300- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 308 PM MST MON AUG 13 2001 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA NORTHWESTERN PINAL COUNTY IN SOUTH CENTRAL ARIZONA * UNTIL 400 PM MST * AT 308 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER SUN LAKES...OR ABOUT 2 MILES NORTHWEST OF SUN LAKES...MOVING NORTH AT 5 MPH. DAMAGING MICROBURST WINDS ARE LIKELY WITH THIS STORM. VERY HEAVY RAIN IS ALSO POSSIBLE. TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN PHOENIX. LAT...LON 3310 11200 3309 11178 3334 11177 3337 11200
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.
NWS Phoenix, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 13, 10:15 AM MST, 4 hours 53 minutes earlier.
Area forecast discussion, Aug 13, 10:15 AM MST, 4 hours 53 minutes before
AZZ020>028-CAZ030>033-132245- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 1015 AM MST MON AUG 13 2001 .SYNOPSIS... A LOW PRESSURE SYSTEM MOVING SLOWLY EAST ACROSS ARIZONA...COMBINED WITH HUMID AIR MEANS SCATTERED MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS TODAY INTO TUESDAY...MOSTLY OVER SOUTH-CENTRAL ARIZONA. HIGH PRESSURE ALOFT WILL BE OFF THE SOUTHERN CALIFORNIA COAST BY MID WEEK. THIS WILL PUSH DRIER AIR FROM THE PACIFIC OVER SOUTHEAST CALIFORNIA AND FAR SOUTHWEST ARIZONA...AND ELIMINATE THE CHANCE OF THUNDERSTORMS THERE BY TUESDAY. THE HIGH PRESSURE AREA WILL MOVE OVER ARIZONA WITH HOTTER WEATHER BY THE LAST HALF OF THE WEEK. .DISCUSSION... THE LOW PRESSURE SYSTEM THAT WAS MOVING WEST OVER CENTRAL INTO WESTERN ARIZONA EARLY LAST NIGHT HAS REVERSED DIRECTION AND IS NOW MOVING SLOWLY EAST. THE AIRMASS IS VERY HUMID AND COMBINED WITH DYNAMICS FROM THE LOW PRESSURE SYSTEM...EXPECT THERE WILL BE SCATTERED SHOWERS AND THUNDERSTORMS...WITH LOCALLY HEAVY RAIN DEVELOPING EAST MAINLY ACROSS MARICOPA COUNTY AND EAST TODAY AND TONIGHT. WILL UPDATE THE FORECAST FOR HIGHER PROBABILITIES OF RAIN IN MARICOPA AND NORTHWEST PINAL COUNTY TODAY AND THIS EVENING. ALSO PLAN ON ISSUING A HAZARDOUS WEATHER OUTLOOK PRIMARILY FOR LOCALLY HEAVY RAIN AND DANGEROUS CLOUD TO GROUND LIGHTNING. HIGH PRESSURE ALOFT WILL BE OFF THE SOUTHERN CALIFORNIA COAST BY MID WEEK. THIS WILL PUSH DRIER AIR FROM THE PACIFIC OVER SOUTHEAST CALIFORNIA AND FAR SOUTHWEST ARIZONA...AND ELIMINATE THE CHANCE OF THUNDERSTORMS THERE BY TUESDAY. THE LOW PRESSURE SYSTEM IS EXPECTED TO BE SOUTHEAST OF SOUTH-CENTRAL ARIZONA BY TUESDAY NIGHT...WHICH MEANS A DECREASING CHANCE OF THUNDERSTORMS FOR SOUTH-CENTRAL ARIZONA BY THEN. THE HIGH PRESSURE AREA WILL MOVE OVER ARIZONA WITH HOTTER WEATHER BY THE LAST HALF OF THE WEEK. ELLIS
In the hours before
Special weather statement, Aug 13, 11:30 AM MST, 3 hours 38 minutes before
AZZ022>024-027-028-140700-
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PHOENIX AZ
1130 AM MST MON AUG 13 2001
...HAZARDOUS WEATHER POSSIBLE OVER SOUTH-CENTRAL ARIZONA THIS
AFTERNOON AND TONIGHT...
COUNTIES IN THE RISK AREA INCLUDE:
IN ARIZONA...MARICOPA...NORTHWEST PINAL...AND SOUTHERN GILA.
THE PRIMARY HAZARDOUS WEATHER RISKS INCLUDE:
LOCALLY HEAVY RAIN...DANGEROUS CLOUD TO GROUND LIGHTNING...AND
STRONG GUSTY WINDS.
STORM SPOTTER ACTIVATION MAY BE NECESSARY LATE THIS AFTERNOON AND
TONIGHT.
CRAIG ELLISLocal storm report, Aug 13, 1:50 PM MST, 1 hour 18 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTION
NATIONAL WEATHER SERVICE PHOENIX AZ
150 PM MST MON AUG 13 2001
TIME(MST) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0215 PM DATELAND AZ WIND DAMAGE
08/12/01 YUMA 16 POWER POLES DOWNED
REPORTED BY UTILITY COThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 9:47 PM MST | Flash Flood Warning | PSR | La Paz | 73 min |
| Aug 13, 1:52 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 38 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2001Every severe thunderstorm warning in 2001
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.