Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 57, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 10, 2001, 1:34 PM MST for Gila County, Arizona. It was in force for 36 min. 1 report came from 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, with what was reported inside it.
The facts
- Issued
- Aug 10, 2001, 1:34 PM MST (20:34 UTC)
- Expired
- Aug 10, 2001, 2:10 PM MST
- In force
- 36 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Gila County, AZ
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 10, 1:48 PM MST | Hail 0.75 | Jakes Corner, AZ |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Phoenix, AZ (KPSR), launched 12:00Z, 8.6 hours before the alert went out and 87 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
- 528 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 1446 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 0 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
375 WUUS55 KFGZ 102036 SVRFLG AZC007-102110- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 134 PM MST FRI AUG 10 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WEST CENTRAL GILA COUNTY IN ARIZONA THIS INCLUDES THE CITY OF JAKES CORNER * UNTIL 210 PM MST * AT 134 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER JAKES CORNER...MOVING SOUTHEAST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT OR PASS CLOSE TO... HIGHWAY 188 NEAR MILE MARKER 275 AT 138 PM MST JAKES CORNER AT 138 PM MST ONE INCH DIAMETER HAIL IS LIKELY WITH THIS SEVERE THUNDERSTORM. IF YOU ARE IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A SUBSTANTIAL SHELTER. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE. LAT...LON 3405 11142 3397 11143 3394 11121 3400 11116 $$ JJ
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 Flagstaff, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 10, 9:30 AM MST, 4 hours 4 minutes earlier.
Area forecast discussion, Aug 10, 9:30 AM MST, 4 hours 4 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
930 AM MST FRI AUG 10 2001
.SYNOPSIS...A MOIST NORTHEASTERLY FLOW WILL CONTINUE TO PRODUCE
SHOWERS AND THUNDERSTORMS OVER NORTHERN ARIZONA TODAY. LOW PRESSURE
TO THE EAST WILL BEGIN TO WEAKEN TODAY WITH HIGH PRESSURE BUILDING
OVER SOUTHERN CALIFORNIA. THIS WILL ALLOW A SOMEWHAT DRIER AND
WARMER NORTHWEST FLOW TO DEVELOP ON SATURDAY. HIGH PRESSURE WILL
GRADUALLY SHIFT TO THE FOUR CORNERS AREA BY EARLY NEXT WEEK WITH
ENOUGH MOISTURE FOR A CONTINUING CHANCE OF SHOWERS AND
THUNDERSTORMS.
.DISCUSSION...UPPER TROUGH OVER NEW MEXICO RAPIDLY WEAKENING THIS
MORNING WITH THE UPPER RIDGE OVER SOUTHERN CALIFORNIA BEGINNING TO
DOMINATE THE FLOW PATTERN. IN ANY CASE A GENERAL NORTHERLY FLOW
SHOULD REMAIN THROUGH SATURDAY WITH GRADUAL DRYING OVER THE WESTERN
PORTIONS OF THE COUNTY WARNING AREA (CWA). IF ANYTHING...MOISTURE
WILL INCREASE OVER THE EASTERN PORTIONS OF THE CWA AS THE DEEP
MOISTURE AXIS MOVES EASTWARD. FOR TODAY...THERE ARE STILL WIDESPREAD
1.0 TO 1.5 PRECIPITABLE WATER VALUES AND THE AIR MASS REMAINS VERY
UNSTABLE. THIS MEANS LOTS OF HEAVY RAIN PRODUCING THUNDERSTORMS.
PORTIONS OF YAVAPAI AND COCONINO COUNTIES HAVE SEEN LOTS OF RAIN
OVER THE PAST 48-HOURS AND SOIL CONDITIONS ARE VERY MOIST. WITH DEEP
MOISTURE REMAINING A FLASH FLOOD WATCH HAS BEEN ISSUED UNTIL 800 PM
MST FOR ALL OF YAVAPAI COUNTY AND THE SOUTHWEST PORTION OF COCONINO
COUNTY. THINK THERE WILL BE ANOTHER ROUND OF NOCTURNAL STORMS BUT
WILL BE MORE FOCUSED OVER THE EASTERN HALF OF THE LITTLE COLORADO
RIVER VALLEY...THE EASTERN MOGOLLON RIM...WHITE MOUNTAINS AND
NORTHERN GILA COUNTY. THIS IS BECAUSE THE DEEPER MOISTURE AXIS WILL SHIFT
TO THE EAST TODAY AND A FAIRLY SIGNIFICANT AREA OF LOW INERTIAL
STABILITY IN THE UPPER LEVELS WILL REMAIN THROUGH THE NIGHT. FOR
SATURDAY...WITH SOME DRYING OVER THE WEST...WOULD EXPECT A MORE
DIURNAL TREND TO CONVECTION AND SOMEWHAT LESS ACTIVITY (ALTHOUGH IT
REMAINS MOIST AND MID LEVEL LAPSE RATES REMAIN FAVORABLE). OVER
CENTRAL AND EASTERN PORTIONS EXPECT SCATTERED TO NUMEROUS STORMS
WITH MOISTURE AXIS LOCATED ACROSS THE AREA. CURRENT FORECAST HANDLES
THIS WELL.
MCCOLLUM
.FGZ...FLASH FLOOD WATCH UNTIL 800 PM MST FOR SOUTHWEST COCONINO
COUNTY AND ALL OF YAVAPAI COUNTY.In the hours before
Special weather statement, Aug 10, 9:30 AM MST, 4 hours 4 minutes before
AZZ004>018-037>040-101930- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 930 AM MST FRI AUG 10 2001 ...FLASH FLOOD WATCH UNTIL 800 PM MST FOR SOUTHWEST COCONINO COUNTY AND ALL OF YAVAPAI COUNTY... ...SCATTERED THUNDERSTORMS TODAY ACROSS NORTHERN ARIZONA WITH THE POTENTIAL FOR HEAVY RAINFALL... A MOIST NORTHERLY FLOW WILL REMAIN OVER ARIZONA TODAY AND TONIGHT. AS A RESULT...WIDESPREAD SHOWERS AND THUNDERSTORMS ARE EXPECTED. THE MAIN THREAT FROM THESE STORMS WILL BE HEAVY RAIN...WITH RAINFALL AMOUNTS OF 1 TO 4 INCHES...AND THE POTENTIAL FOR LOCALIZED FLASH FLOODING. FOR TODAY...THE MAIN THREAT OF FLOODING WILL BE LOCATED OVER SOUTHWEST COCONINO COUNTY AND ALL OF YAVAPAI COUNTY WHERE SOIL CONDITIONS HAVE BECOME VERY MOIST. A FLASH FLOOD WATCH HAS BEEN ISSUED UNTIL 800 PM MST FOR THIS AREA. FOR LATE THIS AFTERNOON AND TONIGHT THE THREAT FOR ORGANIZED HEAVY RAIN PRODUCING STORMS WILL SHIFT TO THE EASTERN MOGOLLON RIM...NORTHERN GILA COUNTY...EASTERN PORTIONS OF THE LITTLE COLORADO RIVER VALLEY AND THE WHITE MOUNTAINS.
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 5:11 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Gila, Yavapai | 34 min |
| Aug 9, 10:26 PM MST | Flash Flood Warning | FGZ | Coconino | 2 hr |
| Aug 10, 11:12 AM MST | Severe Thunderstorm Warning | FGZ | Coconino | 33 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.