diff --git a/wxdata/include/scwx/wsr88d/rpg/wmo_header.hpp b/wxdata/include/scwx/wsr88d/rpg/wmo_header.hpp
index 33ba428b..97691a79 100644
--- a/wxdata/include/scwx/wsr88d/rpg/wmo_header.hpp
+++ b/wxdata/include/scwx/wsr88d/rpg/wmo_header.hpp
@@ -35,6 +35,7 @@ public:
    WmoHeader(WmoHeader&&) noexcept;
    WmoHeader& operator=(WmoHeader&&) noexcept;
 
+   const std::string& sequence_number() const;
    const std::string& data_type() const;
    const std::string& geographic_designator() const;
    const std::string& bulletin_id() const;
diff --git a/wxdata/source/scwx/wsr88d/rpg/wmo_header.cpp b/wxdata/source/scwx/wsr88d/rpg/wmo_header.cpp
index c4c86418..189f6668 100644
--- a/wxdata/source/scwx/wsr88d/rpg/wmo_header.cpp
+++ b/wxdata/source/scwx/wsr88d/rpg/wmo_header.cpp
@@ -26,6 +26,7 @@ class WmoHeaderImpl
 {
 public:
    explicit WmoHeaderImpl() :
+       sequenceNumber_ {},
        dataType_ {},
        geographicDesignator_ {},
        bulletinId_ {},
@@ -36,6 +37,7 @@ public:
        productDesignator_ {} {};
    ~WmoHeaderImpl() = default;
 
+   std::string sequenceNumber_;
    std::string dataType_;
    std::string geographicDesignator_;
    std::string bulletinId_;
@@ -52,6 +54,11 @@ WmoHeader::~WmoHeader() = default;
 WmoHeader::WmoHeader(WmoHeader&&) noexcept = default;
 WmoHeader& WmoHeader::operator=(WmoHeader&&) noexcept = default;
 
+const std::string& WmoHeader::sequence_number() const
+{
+   return p->sequenceNumber_;
+}
+
 const std::string& WmoHeader::data_type() const
 {
    return p->dataType_;
@@ -96,9 +103,17 @@ bool WmoHeader::Parse(std::istream& is)
 {
    bool headerValid = true;
 
+   std::string sohLine;
+   std::string sequenceLine;
    std::string wmoLine;
    std::string awipsLine;
 
+   if (is.peek() == 0x01)
+   {
+      std::getline(is, sohLine);
+      std::getline(is, sequenceLine);
+   }
+
    std::getline(is, wmoLine);
    std::getline(is, awipsLine);
 
@@ -107,6 +122,17 @@ bool WmoHeader::Parse(std::istream& is)
       BOOST_LOG_TRIVIAL(debug) << logPrefix_ << "Reached end of file";
       headerValid = false;
    }
+   else if (!sohLine.empty() && !sohLine.ends_with("\r\r"))
+   {
+      BOOST_LOG_TRIVIAL(debug)
+         << logPrefix_ << "Start of Heading Line is malformed";
+      headerValid = false;
+   }
+   else if (!sequenceLine.empty() && !sequenceLine.ends_with(" \r\r"))
+   {
+      BOOST_LOG_TRIVIAL(debug) << logPrefix_ << "Sequence Line is malformed";
+      headerValid = false;
+   }
    else if (!wmoLine.ends_with("\r\r"))
    {
       BOOST_LOG_TRIVIAL(debug)
@@ -122,10 +148,24 @@ bool WmoHeader::Parse(std::istream& is)
    else
    {
       // Remove delimiters from the end of the line
+      if (!sequenceLine.empty())
+      {
+         sequenceLine.erase(sequenceLine.end() - 3);
+      }
+
       wmoLine.erase(wmoLine.end() - 2);
       awipsLine.erase(awipsLine.end() - 2);
    }
 
+   // Transmission Header:
+   // [SOH]
+   // nnn
+
+   if (headerValid && !sequenceLine.empty())
+   {
+      p->sequenceNumber_ = sequenceLine;
+   }
+
    // WMO Abbreviated Heading Line:
    // T1T2A1A2ii CCCC YYGGgg (BBB)