Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 51, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Oct 7, 2001, 1:05 PM MST for Gila County, Arizona. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Oct 7, 2001, 1:05 PM MST (20:05 UTC)
- Expired
- Oct 7, 2001, 1:45 PM MST
- In force
- 40 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Gila County, AZ
The radar
The Flagstaff radar (KFSX), 93 km from the middle of the area, began a volume at 20:05 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 12:00Z, 8.1 hours before the alert went out and 181 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
- 233 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 1362 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
216 WUUS55 KPSR 072008 SVRPHX AZC007-072045- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 105 PM MST SUN OCT 7 2001 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WEST CENTRAL GILA COUNTY IN EAST CENTRAL ARIZONA * UNTIL 145 PM MST * AT 1258 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER EXTREME NORTHEASTERN MARICOPA COUNTY...OR ABOUT 12 MILES WEST OF ROOSEVELT...MOVING NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL... PASS BETWEEN ROOSEVELT AND SUNFLOWER JUST SOUTH OF PUNKIN CENTER BY 135 PM MST REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN PHOENIX.
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 Oct 7, 10:05 AM MST, 3 hours earlier.
Area forecast discussion, Oct 7, 10:05 AM MST, 3 hours before
AZZ020>028-CAZ030>033-072245- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 1005 AM MST SUN OCT 7 2001 .SYNOPSIS... A STRONG LOW PRESSURE SYSTEM WILL MOVE INTO SOUTHERN CALIFORNIA TODAY SPREADING A CHANCE FOR SHOWERS AND THUNDERSTORMS ACROSS THE REGION THROUGH TONIGHT. THE LOW PRESSURE SYSTEM IS EXPECTED TO MOVE INTO ARIZONA MONDAY MORNING...AND INTO NEW MEXICO MONDAY EVENING... BRINGING AN END TO THE SHOWER ACTIVITY. A WEAKER LOW PRESSURE SYSTEM WILL MOVE INTO NORTHERN ARIZONA TUESDAY...PRODUCING A CHANCE FOR SHOWERS OVER PARTS OF SOUTH CENTRAL ARIZONA. DRY COOLER NORTHWEST FLOW ALOFT IS EXPECTED OVER SOUTHWEST AND SOUTH CENTRAL ARIZONA WEDNESDAY THROUGH SATURDAY. .DISCUSSION... UPPER LOW STILL SITUATED OVER FAR SRN CA WITH VORT LOBES EXPECTED TO ROTATE INTO THE CWFA...MAINLY CO RIVER EWD. AMS STILL VERY MOIST AND UNSTABLE...AND...WITH LOTS OF SUNSHINE IN MOST PLACES THIS MORNING... EXPECT ANOTHER DECENT BATCH OF SHOWERS AND THUNDERSTORMS TO FORM. NICE UPPER DIFFLUENT SITUATION ALSO EXPECTED TO AID IN STORM DEVELOP- MENT TODAY AND TONIGHT. BELIEVE MAIN THREAT FROM THESE STORMS WILL BE LOCALLY HEAVY RAINFALL. WILL MONITOR CLOSELY FOR ANY STORM ORGANIZATION THAT MAY REQUIRE A FLASH FLOOD WATCH. UPPER LOW WILL SLOWLY OPEN UP AND MOVE THRU SRN AZ ON COLUMBUS DAY FOR GRADUALLY IMPROVING WEATHER. HAVE ALREADY TWEEKED MID ZONES FOR MAINLY FIRST PERIOD PURPOSES...OTHERWISE FORECASTS IN GOOD SHAPE FOR NOW. ESTLE .PSR...NONE.
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.